erosion sediment yield 基本例句 侵蚀产沙 Soil erosion on loess slopes has clear vertical zonation.Each erosion zone has its own characteristics of erosion and sediment yield, and the zones tend to have mutual influence.黄土梁峁坡面土壤侵蚀具有明显的垂直分带性,不同侵蚀带具有各自的侵蚀产沙特点,且彼此相互影响。